Question: In Harry Potter, what does the term pureblood mean?
Paraphrase: What does the term pureblood mean in Harry Potter?
SPARQL (Wikidata):  select distinct ?obj where { wd:Q8337 wdt:P674 ?obj . ?obj wdt:P31 wd:Q12372870 } 
Answer: Ron Weasley, Ginny Weasley, James Potter